黄龙山林区不同培育措施对油松种群数量动态及物种多样性的影响

根据对黄龙山林区经过抚育、渐伐和封育措施的3类油松林种群开展样地调查,研究了3种培育措施对油松林种群的年龄结构、静态生命表、存活曲线和物种多样性的影响,并运用时间序列模型对不同培育措施的油松林种群数量动态进行了预测.结果表明:3种油松林种群结构特征基本一致,其幼、老龄级个体数较少,中龄级个体数量较大,总体判断黄龙山油松林种群属于稳定状态.在经历3种不同培育措施的油松林群落中,抚育和渐伐措施物种丰富度指数最大;封育措施物种多样性和均匀度指数最大.经过抚育和渐伐措施的油松种群属进展型,而经过封育措施的油松种群属稳定型.说明在黄龙山林区,油松林种群未来应该以封育为主,适当的抚育和渐伐措施为辅,以促进群落持续发育.

Effects of Different Forest Practices on Pinus tabulaeformis Population Numbers and Species Diversity in the Forest Region of Huanglongshan Mountain

Three Pinus tabulaeformis populations with tending,inter-felling and closed tending separately practiced were investigated to study the effects of these three forest practices on the age structures,static life tables,survival curves and species diversities of P.tabulaeformis populations in Huanglongshan Mountain and time series model was adopted to predict the dynamic population numbers of different P.tabulaeformis populations with different forest practices practiced.The results revealed that the three populations are essentially identical in population structure,their young and old individuals making up a small proportion and their mid-aged individuals making up a large proportion and consequentially P.tabulaeformis populations generally stand stable.In the P.tabulaeformis communities with three tending practices,the highest species abundance index appears with tending and inter-felling and the highest evenness index and species diversity appears with closed tending.The P.tabulaeformis populations with tending and inter-felling practiced belong to a developmental type and the P.tabulaeformis populations with closed tending practices belong to a stable type.These indicates that In the future,closed tending as the major practice and tending and inter-felling as the supporting practices should be practiced for P.tabulaeformis populations in Huanglongshan Mountain so that the communities will continuously develop.